http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. There is hope for those who miss one night too many or whose children keep them up at night. The unwelcome effects of a bad night's sleep - forgetfulness, impaired mental performance - can be dealt with by reducing the concentration of an enzyme in the brain. http://www.physorg.com/news178449806.html Medicine & Health Thu, 26 Nov 2009 09:26:11 EST news178449806 Sleep deprivation adversely affects automatic, accurate responses and can lead to potentially devastating errors, a finding of particular concern among firefighters, police officers, soldiers and others who work in a sleep-deprived state, University of Texas at Austin researchers say. http://www.physorg.com/news177611122.html Medicine & Health Mon, 16 Nov 2009 16:50:02 EST news177611122 A study in the Nov.1 issue of the journal Sleep shows that sleep deprivation causes some people to shift from a more automatic, implicit process of information categorization (information-integration) to a more controlled, explicit process (rule-based). This use of rule-based strategies in a task in which information-integration strategies are optimal can lead to potentially devastating errors when quick and accurate categorization is fundamental to survival. http://www.physorg.com/news176403779.html Medicine & Health Mon, 02 Nov 2009 19:40:02 EST news176403779 (AP) -- Sleepless in Seattle? Hardly. West Virginia is where people are really staying awake, according to the first government study to monitor state-by-state differences in sleeplessness. http://www.physorg.com/news176059549.html Medicine & Health Thu, 29 Oct 2009 18:26:36 EST news176059549 (PhysOrg.com) -- The author of a new report suggests the belief that harsh interrogation and torture techniques are effective is a form of folk neuroscience that is not supported by scientific evidence, and does not fit with what we know about how the brain works. http://www.physorg.com/news173424688.html Medicine & Health Tue, 29 Sep 2009 11:00:02 EST news173424688 Chronic sleep deprivation in a mouse model of Alzheimer's disease makes Alzheimer's brain plaques appear earlier and more often, researchers at Washington University School of Medicine in St. Louis report online this week in Science Express. http://www.physorg.com/news173021249.html Medicine & Health Thu, 24 Sep 2009 15:20:01 EST news173021249 A study in the July 1 issue of the journal Sleep suggests that postpartum depression may aggravate an already impaired sleep quality, as experiencing difficulties with sleep is a symptom of depression. Twenty-one percent of depressed postpartum women included in the study reported having also been depressed during pregnancy and 46 percent reported at least one previous depressive episode prior to conception, suggesting that new mothers diagnosed with postpartum depression are not merely reporting symptoms of chronic sleep deprivation. http://www.physorg.com/news165647053.html Medicine & Health Wed, 01 Jul 2009 06:40:01 EST news165647053 New imaging research in the June 24 issue of The Journal of Neuroscience helps explain why sleep deprivation affects some people more than others. After staying awake all night, those who are genetically vulnerable to sleep loss showed reduced brain activity, while those who are genetically resilient showed expanded brain activity, the study found. The findings help explain individual differences in the ability to compensate for lack of sleep. http://www.physorg.com/news165064828.html Medicine & Health Wed, 24 Jun 2009 12:21:06 EST news165064828 Caffeine use prevents increased risk taking that occurs after several nights of total sleep deprivation, according to new research. Results indicate that despite extreme sleep deprivation, participants who had consumed caffeine did not exhibit increased risky behavior on the Balloon Analog Risk Task (BART), a computerized measure of impulsive risk-taking. http://www.physorg.com/news163823083.html Medicine & Health Wed, 10 Jun 2009 05:30:01 EST news163823083 Contrary to popular belief, the timing of sleep in new mothers is preserved after giving birth. Researchers state that while postpartum mothers did experience sleep disruption and daytime consequences, their sleep/wake times remained aligned with self-reported preferred sleep/wake times. http://www.physorg.com/news163822865.html Medicine & Health Wed, 10 Jun 2009 03:40:01 EST news163822865 According to a research abstract that will be presented at SLEEP 2009, the 23rd Annual Meeting of the Associated Professional Sleep Societies, older adults are able to retain better cognitive functioning during sleep deprivation than young adults. http://www.physorg.com/news163822690.html Medicine & Health Wed, 10 Jun 2009 03:30:01 EST news163822690 Researchers at Washington University School of Medicine in St. Louis have created a line of fruit flies that may someday help shed light on the mechanisms that cause insomnia in humans. The flies, which only get a small fraction of the sleep of normal flies, resemble insomniac humans in several ways. http://www.physorg.com/news163182399.html Medicine & Health Tue, 02 Jun 2009 17:27:21 EST news163182399 The secret of staying thin could be at least partly down to a good night's rest, an international conference on obesity heard in Amsterdam on Thursday. http://www.physorg.com/news160924522.html Medicine & Health Thu, 07 May 2009 14:15:41 EST news160924522 Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains conscious. What is more, the mammals seem to be able to remain continually vigilant for sounds for days on end. http://www.physorg.com/news160384772.html Biology Fri, 01 May 2009 08:19:57 EST news160384772 A recent Finnish study suggests that children's short sleep duration even without sleeping difficulties increases the risk for behavioral symptoms of ADHD. http://www.physorg.com/news160056251.html Medicine & Health Mon, 27 Apr 2009 13:04:46 EST news160056251 Insomnia has long been associated with poor health, including weight gain and even obesity. Now researchers at UCLA have found out why. http://www.physorg.com/news157211284.html Medicine & Health Wed, 25 Mar 2009 14:48:30 EST news157211284 (Physorg.com) -- Sleep experts know that the mental clarity lost because of a few sleepless nights can often be restored with a good night's rest. Now, UT Southwestern Medical Center researchers have identified a key molecular mechanism that regulates the brain's ability to mentally compensate for sleep deprivation. http://www.physorg.com/news154683529.html Medicine & Health Tue, 24 Feb 2009 07:39:30 EST news154683529 If you ever argued with your mother when she told you to get some sleep after studying for an exam instead of pulling an all-nighter, you owe her an apology, because it turns out she's right. And now, scientists are beginning to understand why. http://www.physorg.com/news153578717.html Medicine & Health Wed, 11 Feb 2009 12:45:56 EST news153578717 Is sleep essential? Ask that question to a sleep-deprived new parent or a student who has just pulled an "all-nighter," and the answer will be a grouchy, "Of course!" http://www.physorg.com/news138941239.html Biology Tue, 26 Aug 2008 03:47:19 EST news138941239 Just one night without sleep can increase the amount of the chemical dopamine in the human brain, according to new imaging research in the August 20 issue of The Journal of Neuroscience. Because drugs that increase dopamine, like amphetamines, promote wakefulness, the findings offer a potential mechanism explaining how the brain helps people stay awake despite the urge to sleep. However, the study also shows that the increase in dopamine cannot compensate for the cognitive deficits caused by sleep deprivation. http://www.physorg.com/news138384671.html Medicine & Health Tue, 19 Aug 2008 17:11:11 EST news138384671 Staying awake slows down our brains, scientists have long recognized. Mental performance is at its peak after sleep but inevitably trends downward throughout the day, and sleep deprivation only worsens these effects. http://www.physorg.com/news136735967.html Biology Thu, 31 Jul 2008 15:12:47 EST news136735967 Researchers at the University of Pennsylvania School of Medicine have shown that the unfolded protein response, which is a reaction to stress induced by sleep deprivation, is impaired in the brains of old mice. http://www.physorg.com/news133784411.html Medicine & Health Fri, 27 Jun 2008 11:20:11 EST news133784411